1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2019 Federico Bonfiglio <[email protected]>
4 * Copyright (c) Linux Test Project, 2019-2022
5 */
6
7 /*\
8 * [Description]
9 *
10 * Test ioctl_ns with NS_GET_PARENT request.
11 *
12 * Test tries to get namespace parent for UTS namespace, which
13 * should make the call fail with EINVAL, being a nonhierarchical
14 * namespace.
15 */
16
17 #define _GNU_SOURCE
18
19 #include <errno.h>
20 #include "tst_test.h"
21 #include "lapi/ioctl_ns.h"
22
setup(void)23 static void setup(void)
24 {
25 int exists = access("/proc/self/ns/uts", F_OK);
26
27 if (exists < 0)
28 tst_res(TCONF, "namespace not available");
29 }
30
run(void)31 static void run(void)
32 {
33 int fd, parent_fd;
34
35 fd = SAFE_OPEN("/proc/self/ns/uts", O_RDONLY);
36 parent_fd = ioctl(fd, NS_GET_PARENT);
37 if (parent_fd == -1) {
38 if (errno == ENOTTY)
39 tst_brk(TCONF, "ioctl(NS_GET_PARENT) not implemented");
40
41 if (errno == EINVAL)
42 tst_res(TPASS, "NS_GET_PARENT fails with EINVAL");
43 else
44 tst_res(TFAIL | TERRNO, "unexpected ioctl error");
45 } else {
46 tst_res(TFAIL, "call to ioctl succeded");
47 }
48 SAFE_CLOSE(fd);
49 }
50
51 static struct tst_test test = {
52 .test_all = run,
53 .min_kver = "4.9",
54 .setup = setup
55 };
56